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The Arrowhead Athletic Conference (AAC) began its existence in the 2020-21 school year with 13 schools. The conference expanded in the 2022-23 releaguing cycle and now consists of 14 schools. Teams from each school are placed into one of three leagues. Depending on the number of schools participating in each sport, they are divided into the Sunkist League, San Andreas League, and Skyline League. League placement for each sport will be determined yearly by a competitive equity model. Schools can have programs assigned to any of those leagues depending on that individual sport's most recent performances.

Arroyo Valley HS

Established in 2001, and belonging to the San Bernardino City Unified School District. The Hawks competed in the San Andreas League prior to merging with the AAC.

1881 W. Baseline St., San Bernardino, CA 92411

Bloomington HS

Established in 1962, and a part of the Colton Joint Unified School District. The Bruins competed in the Sunkist League prior to merging with the AAC.

10750 Laurel St., Bloomington, CA 92316

Carter HS

Established in 2004, and part of the Rialto Unified School District. The Lions most recently competed in the Citrus Belt League prior to joining the AAC.

2630 N. Linden Ave., Rialto, CA 92377

Colton HS

Established in 1895, and part of the Colton Joint Unified School District. The Yellowjackets most reecntly played in the Sunkist League prior to merging with the AAC. They have also been league rivals with Fohi in both the Sunkist and Citrus Belt Leagues in years past.

777 W. Valley Blvd., Colton, CA 92324

Eisenhower HS

Established in 1959 and a part of the Rialto Unified School District. The Eagles most recently competed in the San Andreas league prior to merging with the AAC. They have formerly been league rivals with Fohi in the Citrus Belt League.

1321 N. Lilac Ave. Rialto, CA 92376

Grand Terrace HS

Established in 2012, and part of the Colton Joint Unified School District. Prior to merging with the AAC, the Titans had been members of the Sunkist League since the school opened.

21810 Main St., Grand Terrace, CA 92313

Jurupa Hills HS

Established in 2010 as the fifth comprehensive high school of the ³ÉÈËÊÓƵ. Prior to their merger with the AAC, the Spartans competed in the San Andreas League since the school opened.

10700 Oleander Ave., Fontana, CA 92337

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Kaiser HS

Established in 1999, and the third comprehensive high school of the ³ÉÈËÊÓƵ. The Cats had been members of the Sunkist League since the school opened before merging into the AAC.

11155 Almond Ave., Fontana, CA 92337

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Notre Dame HS - RIverside

Established in 1956, and part of the Diocese of San Bernardino. The Titans joined the AAC as the 14th school for the 2022-23 school year. They most recently competed as part of the Raincross Conference.

7085 Brockton Ave., Riverside, CA 92506

Rialto HS

Established in 1992, and part of the Rialto Unified School District. The Knights most recently competed in the San Andreas League prior to merging with the AAC. They are former Fohi league rivals in the Citrus Belt League.

595 S. Eucalyptus Ave., Rialto, CA 92376

Rim of the World HS

Established in 1948, and a part of the Rim of the World Unified School District. The Fighting Scots most recently competed in the San Andreas League prior to merging with the AAC.

27400 SA-18, Lake Arrowhead, CA 92352

San Gorgonio HS

Established in 1965 and part of the San Bernardino City Unified School District. The Spartans most recently competed in the San Andreas League prior to merging with the AAC. In the past they were a Fohi league rival in the Citrus Belt League.

2299 Pacific St., San Bernardino, CA 92404

Summit HS

Established in 2006 as the fourth comprehensive high school of the ³ÉÈËÊÓƵ. The Skyhawks competed in the Sunkist League from their inception until the merger with the AAC.

15551 Summit Ave., Fontana, CA 92336

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The three leagues that make up the Arrowhead Athletic Conference are the Sunkist, San Andreas, and the Skyline Leagues. The original AAC was formed by the merger of the Sunkist League and the San Andreas League. Carter HS and Notre Dame Riverside joined the merged leagues to create the current AAC lineup. The Skyline League was created to house a third tier of conference play.